Grain-separator.



D. W. STAHL.

GRAIN SEPARATOR.

APPLICATION FILED MAY 13, 1910.

1,051,027, Patented Ja11.21, 1913.

2 SHEETS-SHEET l.

+1. KKK i I COLUMBIA PLANOGRAPH 60., WASHINGTON, u. c.

1). W. STAHL.

GRAIN SEPARATOR.

APPLICATION FILED MAY 13. 1910.

1,05 1,027. Patented Jan. 21, 1913.

' 2 SHEBTSSHEET 2. ,52

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DAVID W. STAHL, OF SNYDER COUNTY, PENNSYLVANIA.

GRAIN-SEPABATOR.

Application filed May 13, 1910.

Specification of Letters Patent.

Patented Jan. 21, 1913.

Serial No. 561,234..

To all whom 1'25 may concern:

Be it known that 1, DAVID lV. STAHL, a citizen of the United States,residing in the county of Snyder and State of Pennsylvania, haveinvented certain new and useful Improvements in Grain-Separators, ofwhich the following is a specification.

My invention relates to separating machines, and more particularly tothat class of machines designed especially for use in cleaning grain andseparating it from chaff, trash and other foreign material.

Among the objects of the invention may be mentioned the provision ofimproved means for supporting the shaking screens and for varying theextent of movement given to them.

lVith the above and other objects in view, and to improve generally uponthe details of such apparatus, my invention consists in the constructionand arrangement of parts hereinafter described and claimed, in which,

Figure 1 is a side elevation of my improved machine; Fig. 2 is a centrallongitudinal section therethrough; Fig. 3 is a view partly in endelevation and partly in section along the line 33 of Fig. 1; Fig. at isa fragmen tary front elevation showing the method of supporting theshaker; Fig. 5 is a fragmentary sectional view showing the operatingeccentric; and, Fig. 6 is a fragmentary perspective showing the methodof supporting and operating the screens.

My invention, as shown, consists of a complete machine adapted for usein connec tion wit-h a thresher or fan of any suitable type, the grainpassing from such fan into my improved separator. Certain of itsfeatures, however, admit of application as at tachments to existingmakes of fans or separators, as will be understood from the followingdescription.

Referring to the drawings in detail, the machine, as shown, comprisesthe corner 'posts 1 between which extend the side boards Cross bars 3and 4: extend across the ends of the machine and in conjunction with theplate 5 and tie rod 6 serve to secure the two sides of the frametogether and support the mechanism.

' The shaker is designated in its entirety by the reference character 7,and is supported near one end by the swinging links 8, having their ends9 journaled in the side boards of the machine. At the other end, theshaker is supported on a pair of links 10 pivoted thereto and pivotallymounted at their lower ends 11 upon the cross beam 3. The shakercomprises a chute 12 adapted to receive the grain at its upper end 12and a spout 13 adapted to deliver the grain upon the screens. Below thespout 13 the shaker bottom extends downwardly as indicated at 14 andserves as a chute to catch the grain from the sieves and convey it to asuitable receptacle.

Extending across the machine and mounted in brackets secured to thebottom of the shaker is a bar or shaft 15. Pivoted to the bar 15 at eachside of the machine is a pitman 16, having at its other end a journalbox 17, in which works an eccentric 18 mounted on the maindrive shaft 19of the machine. This shaft extends entirely across the machine and isjournaled in brackets 19 depending from the side boards 2. On one end ofthis shaft is mounted a drive pulley 20 which may be belted to anysuitable source of power. In the embodiment shown in the drawings,however. the separator is adapted for use as a hand power machine and,therefore, a belt 21 is provided extending from the pulley 20 around thedrive wheel 22 mounted on a shaft 23 journaled in the side boards, andprovided with a handle. 23 by means of which it may be turned.

My improved separator is adapted to employ a. plurality of superposedscreens of various degrees of fineness. Two such screens 24 and 25 areshown in the drawing. These screens are provided with solid extensions26 and 27 respectively, adapted to underlie the spout 13 in such amanner that the grain may be discharged from the shaker on to thescreens. Near the end of the screensadjacent the chute is arranged abail 28 which extends underneath the lowermost screen, as clearly shownin Fig. 2, and serves to support the screens. Each end 29 of this bailis journaled in a crank arm 30, rigidly secured to a transverselyextending shaft 81 mounted in the side boards of the ma chine. Out-sideof the machine the shaft 31 terminates at one end in a bell crank lever32. The end of this bell crank issupported by means of a pin or stud 33set into the side board. For some classes of work both screens areemployed, while for others, but a single screen is used. WVhen the upperscreen 24:, for instance, is removed, the construction above describedpermits of the lowerscreen being raised into operative 'position withrespect to the chute 13. This is done by turning the shaft 31 thuslifting the bail 28 and with it the screen 25. Vhen the shaft has beenturned to some such position, as indicated by dotted lines in Fig. ,1,the bell crank 32 may be supported in this position by withdrawing thepin 33 and inserting it in another hole (not shown).

At the rear end of the machine the screens terminate in rods 34 and 35which are extended beyond the side frames of the screens to formpintles, as clearly shown in Fig. 6. These pintles are adapted to restbehind the clips 36 and 37 secured at each side of the machine to aswinging arm 38,

' pivoted at its upper end to a transversely extending shaft 39journaled in the side boards of the machine. It will thus be readilyseen that the screens may be lifted out of engagement with the clips andwithdrawn from the machine when desired. The lower end of each of thearms 38 is bifurcated so as to form a slot 40 and in this slot works atransversely extending rod 41. By reference to Fig. 1, it will be seenthat a connection 42 extends between the end of the rod 41 on each sideof the machine and the end of bar 15, such connection being pivotallyattached both to the rod and bar. As shown, the connection comprises abow shaped strip of spring steel the resiliency of which serves toincrease the effectiveness of the shaking motion imparted to thescreens. In this connection it will be observed that the screens arereciprocated solely by means of this connection 42, the motion beingreceived from the bar 15 attached as above described to the shaker, andtransmitted through the connection 42 to the rod 41, thence to theswinging arms 38 and thence to the screens.

On each end of the shaft 39 is fixed a drum 43 about which is adapted tobe wound a flexible connection 44 attached at its lower end to the rod41. On one side of the machine at the extreme end ofshaft 39 is provideda hand wheel 47 by means of which the shaft may be turned, and a ratchetwheel 45, cooperating with a pawl 46, pivoted to the frame 1 of themachine, for holding the shaft in adjusted position. It will be evidentthat by turning the shaft 39 and winding the flexible connections 44upon the drums 43 the rod 41 may be moved in the slot 40 toward thepivot point of the arms 38 in such a manner that the throw or strokeimparted to the screens can be varied as desired. When the parts are inthe position shown in. the drawings, the throw of the screens will be aminimum, owing to the fact that the point of connection of the members42 to the arms 38 is at the greatest distance from the shaft 39, butwhen the rod 41 is lifted to the upper part of the slot 40 the distancefrom the pivot point will be decreased and the extent of movement of thescreens correspondingly increased.

It will thus be seen that 1 have provided a grain separator havingimproved means for effecting several desirable adjustments and capableof being applied to a number of differentuses, and it is thought thatthe many advantages of my invention will be readily appreciated by thoseskilled in the art.

hat I claim is 1. In a grain separator, a frame, a chute supportedthereby and adapted to receive the grain, a swinging screen disposedbelow the chute, a pair of arms pivoted at one end to the frame, meansfor attaching one end of said screen to said arms, driving meansconnected with said arms for oscil lating said screen, and means forshifting the point of connection of such driving means relative to thepivot point of said arms, whereby their throw may be correspondinglyvaried.

2. In a grain separator, a frame, a chute supported thereby and adaptedto receive the grain, a swinging screen on to which the grain isdischarged from said chute, a pair of slotted arms pivoted atone end tosaid frame and connected with said screen, a rod passing through theslots in said arms, means for imparting reciprocatory motion to said rodparallel with itself, and means for shifting said rod in said slotstoward and from the pivot point of said arms, whereby the extent ofmovement imparted to said screen may be varied as desired.

3.1n a grain separator, a frame and shaker supported thereby and adaptedto receive the grain, a swinging screen on to which the grain isdischarged from said shaker, a pair of slotted arms pivoted at one endto said frame and connected with said screen, a rod passing through theslots in said arms, means for imparting a recip rocatory motion to saidshaker, a resilient connection between said rod and said shaker, andmeans for shifting said rod along said slots toward and from the pivotpoint of said arms, whereby a reciprocatory movement is also imparted tosaid screen, and

whereby the extent of such movement may be varied as desired.

In testimony whereof I {1111K my signature, in presence of twowitnesses.

DAVID W. STAHL;

addressing the fiommissioner' of. Patents,

